Fair rating?Stargate Atlantis· Season 4 · Episode 4
Doppelganger
During an exploratory walk on a jungle planet, Lt. Col. Sheppard touches a glowing crystalline growth and unwittingly becomes host to an infectious energy form.
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#20In Season 4of 20 rated episodes
#86All-timeof 100 rated episodes
−0.8vs season avgSeason 4 averages 7.7
2007First airedOctober 19, 2007
Guest stars
David Nyklas Dr. Radek Zelenka
Kavan Smithas Major Lorne
Jewel Staiteas Dr. Jennifer Keller
Claire Rankinas Dr. Kate Heightmeyer
Linda Koas Nurse Marie
Yee Jee Tsoas TechnicianCrew
Robert C. CooperWriter · DirectorShows like Stargate Atlantis
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